Aden

UK: /ˈeɪd^ən/ US: (äd′n, ād′n)

WordReference Random House Unabridged Dictionary of American English © 2025

A•den  (äd′n, ād′n), n. 

1. Place Names a seaport in and the economic capital of the Republic of Yemen, in the S part: formerly the center of a British colony. 318,000.
2. Place Names Colony of. Also called State of Aden. a former British colony on the Gulf of Aden and a member of the former Federation of South Arabia. 75 sq. mi. (194 sq. km).
3. Place Names Protectorate of, former name, until 1962, of the former Protectorate of South Arabia.
4. Place Names Gulf of, an arm of the Arabian Sea between the E tip of Africa and the Arabian Peninsula.

aden-, 

1. var. of adeno- before a vowel:
   adenitis.

Collins Concise English Dictionary © HarperCollins Publishers::

Aden / ˈeɪd^ən/ noun

1. the main port and commercial capital of Yemen, on the N coast of the Gulf of Aden, an arm of the Indian Ocean at the entrance to the Red Sea: capital of South Yemen until 1990: formerly an important port of call on shipping routes to the East. Pop: 584 000 (2005 est)
2. a former British colony and protectorate on the S coast of the Arabian Peninsula: became part of South Yemen in 1967, now part of Yemen. Area: 195 sq km (75 sq miles)